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Dry Riser Testing / Maintenance

Dry Riser Testing / Maintenance

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What is a dry riser?
A dry riser is a system of valves and pipework needed by the Fire Service to pump water on to upper floors of a building.They are sometimes known as riser mains.

Where are dry risers found?
Dry risers are in buildings over 18 metres above ground level and in low level buildings where there are excessive distances from entrances (60m).

What does a dry riser look like?
What does a dry/wet riser system look like?
Typical dry risers contain components such as:

  • large vertical pipe of 100 mm diameter that can run internally or externally to the building
  • twin inlet connection at street level boxed in a steel cabinet with glazed door
  • outlet valves at each landing
  • automatic valve at the highest point to provide automatic bleeding of air from the system when it is filled with water.

Why is dry riser testing important?
They form part of your fire safety system and therefore form a critical part of protecting your organisation. Risers are prone to neglect and vandalism. Serious penalties are likely if your rising main failed to work in the event of a fire.

Who can conduct a dry riser test?
Dry riser testing and inspection must be done by a suitably qualified specialist.

What is covered by a dry riser test / Dry riser annual pressure test service?

  • visual inspection service of the entire system
  • test the riser with water and pressurise
  • check entire system for any obvious leakage
  • Identify whether there is any appreciable loss in pressure
  • Drain dry riser completely after test is complete
  • Post inspection labelling and report will be provided.

How often should a dry riser be inspected?
BS 9990 : 2015 recommends for dry risers:

  • a visual inspection every six months
  • an annual pressure test.

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